wrtfile – Write TeX files from a TeX document

Wrt­file is a means of cre­at­ing self-ex­tract­ing dis­tri­bu­tions in
TeX files; it is sim­i­lar in con­cep­tion to the LaTeX
doc­strip mech­a­nism, but is some­what
more ef­fi­cient. Wrt­file is (of course) dis­tributed us­ing its own
mech­a­nisms.